[Linux] Make alias

1) Execute application on Linux

$ path/application_name

2) Execute app by alias

$ alias shortcut_key="path/app"

eg.

$ alias Typora="/home/henry/Documents/app/Typora-linux-x64/Typora"

3) Use alias permanently

$ gedit ~/.bashrc
~~
and add `alias Typora="/home/henry/Documents/app/Typora-linux-x64/Typora"`
at the bottom.
After then,

$ source ~/.bashrc
~~~